Agreed on all accounts, with one small, specific clarification: If computation is local to each of many long-running threads, and the two-way messages being pa

Agreed on all accounts, with one small, specific clarification: If computation is local to each of many long-running threads, and the two-way messages being passed around is small enough (so the serialization overhead is negligible), then threads do perform better on multi-core machines than alternative models. EtherCalc.org is one such use case: http://aosabook.org/en/posa/from-socialcalc-to-ethercalc.html#multi-core-scaling http://aosabook.org/en/posa/from-socialcalc-to-ethercalc.htm...